Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Dave1234 on September 17, 2016, 01:42:23 PM

Title: Brake Piston Stuck
Post by: Dave1234 on September 17, 2016, 01:42:23 PM
Hi all, still trying to sort out thr front brake on my 550K3, the wheel caliper piston is stuck all the way in, how do I get it out? I think it is partially seized. Also the front disc plate was rubbing on the fork bottom, I slacken the front wheel clamps and tap the spindle slighty which released it but how much tolerance should you have between the disc plate and fork bottom leg?
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 17, 2016, 02:19:40 PM
Or what other models caliper fit the 550K3?
Title: Re: Brake Piston Stuck
Post by: Chris400F on September 17, 2016, 02:52:44 PM
See page 8 of this thread.
http://www.sohc.co.uk/index.php/topic,10585.msg78485.html#msg78485
Title: Re: Brake Piston Stuck
Post by: Bryanj on September 17, 2016, 03:06:54 PM
If you don't fancy doing it yourself you can post it to me and I will strip it and quote for parts
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 17, 2016, 03:37:56 PM
See page 8 of this thread.
http://www.sohc.co.uk/index.php/topic,10585.msg78485.html#msg78485

Looks like my grease gun is a different thread.  :'(
Title: Re: Brake Piston Stuck
Post by: Bryanj on September 17, 2016, 04:49:53 PM
They are all a different thread but will screw in about 1 1/2 turns and will work
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 19, 2016, 09:21:07 AM
See page 8 of this thread.
http://www.sohc.co.uk/index.php/topic,10585.msg78485.html#msg78485

Thanks Chris, the grease gun trick worked a treat, you learn something new everyday.  ;D ;D ;D
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 21, 2016, 06:19:38 PM
Hi all, still trying to sort out thr front brake on my 550K3, the wheel caliper piston is stuck all the way in, how do I get it out? I think it is partially seized. Also the front disc plate was rubbing on the fork bottom, I slacken the front wheel clamps and tap the spindle slighty which released it but how much tolerance should you have between the disc plate and fork bottom leg?

Anyone got any ideas on the disc plate and lower fork outer clearance?
Title: Re: Brake Piston Stuck
Post by: Bryanj on September 22, 2016, 06:25:56 AM
Only reasons for disc rubbing are incorrect assembly or shot wheel bearings
Title: Re: Brake Piston Stuck
Post by: Rob.b (Rob Birkett - RIP) on September 22, 2016, 09:04:30 AM
hi,

For correct parts and assembly use this link:

http://www.cmsnl.com/honda-cb550k3-four-england_model14671/partslist/F09.html#results

The clearance between disc outer face and fork leg inner should be about 5mm. I couldn't measure mine accurately and its on a CB500K but I'm pretty sure its the same as the parts are mostly interchangeable.

Good  luck with it

Rob
Title: Re: Brake Piston Stuck
Post by: matthewmosse on September 22, 2016, 12:07:05 PM
That detail has been bugging me, I think Brian is right, in the normal course of things the front wheel will only sit in its proper place, so if its able to move then either a part is in wrong way around or a wrong part is fitted, or you have very knackered wheel bearings indeed. I would suspect wrong bits or a spacer fitted backwards, or the wheel nut wrongly fitted.
Title: Re: Brake Piston Stuck
Post by: paulbaker1954 on September 23, 2016, 11:44:52 PM
I Agee with Ken I had exactly the same problem when I had new tyre fitted and just took the wheels in . The fitter reassembled the spindle wrongly. Had me scratching my head for ages.
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 25, 2016, 10:18:22 AM
I think your right about the spindle being fitted the wrong way round. I have just visited David Silver's museum in Leiston, Suffolk and looked at his CB550 and noticed it was the other way round. I bought the bike earlier this year and have realised quite a few things butchered on the bike. Cheers for all the help.
By the way David has got a nice lot of bikes up there in the museum, even one that used to sit in my garage until a Top Gear presenter bought it then sold it to David. Lol
Title: Re: Brake Piston Stuck
Post by: AshimotoK0 on September 25, 2016, 06:03:23 PM
I think your right about the spindle being fitted the wrong way round. I have just visited David Silver's museum in Leiston, Suffolk and looked at his CB550 and noticed it was the other way round. I bought the bike earlier this year and have realised quite a few things butchered on the bike. Cheers for all the help.
By the way David has got a nice lot of bikes up there in the museum, even one that used to sit in my garage until a Top Gear presenter bought it then sold it to David. Lol

It wasn't the CB250K0 was it?
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 25, 2016, 06:49:22 PM
No Ash, have another go. Lol
Title: Re: Brake Piston Stuck
Post by: AshimotoK0 on September 25, 2016, 08:10:36 PM
SS50 perhaps  :D Evidently James May deeply regrets selling/swapping the CB250K0 with DSS ... well he's not having mine!
Title: Re: Brake Piston Stuck
Post by: Dave1234 on September 26, 2016, 07:20:53 AM
Correct. :)
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